My baby doesn't sleep at night. What can I do?

My baby girl will be 5 weeks old on Thursday. She likes too sleep from 6am untill 12pm on and off then be awake for an hour or 2 then will sleep on and off untill about 7/8pm then will stay awake untill 1/2am then will wake up once or twice for a feed.

Is there any way of getting her to sleep in the night or is she too young its driving my other half crazy as he waked up for work at 5.

Why does she sleep soo much in the day and not the night